Exercise platform



FIG. 1 is a perspective view of the exercise device of the present invention showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a frontal view thereof, the rear view being a mirror image;

FIG. 4 is a side view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for an exercise platform, as shown and described. 